There are always two spirits at work: the Holy Ghost and a satanic or false spirit. Witchcraft comes from a satanic spirit and opposes God's Spirit.
Man is not promised an endless supply of strength for him to store up. Rather, God promises to provide the necessary grace and strength for the present trials.
Why would the Lord invite those weary from labour to wear a yoke? And then, why would the Lord promise rest by inviting people to labour?
